In a few months I'll be upgrading from my rebel camera to a 70D. At the same time, I'd like to invest in some nicer glass. I would like to start off by purchasing a wide angle lens, which would mainly be used for landscapes. I've done a bit of research, but I'm still a little unsure whether I should go for the 17-40 or the new 16-35. Quite frankly, I don't see whether there is a significant difference